\documentclass{standalone}
\usepackage{tikz}
\usepackage{ctex,siunitx}
\setCJKmainfont{Noto Serif CJK SC}
\usepackage{tkz-euclide}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{circuitikz}
\usetikzlibrary{patterns, calc}
\usetikzlibrary {decorations.pathmorphing, decorations.pathreplacing, decorations.shapes,}
\ctikzset{bipoles/length=1cm}
\begin{document}
\small
\begin{circuitikz}[>=latex, scale=1,european]
  % \useasboundingbox(0.9,0)rectangle(5.1,5);
  \draw (0,0.8)--(0,0)--(2,0)to [R, *-*](2,2)--(0,2)--(0,1.2);
  \node at (0,0.9){$-$};
  \node at (0,1.0){$\sim$}; \node at (4,1.0){$\sim$};
  \node at (-.6,1.2){前级};
  \node at (-.6,0.8){输出};
  \node at (3.4,1.2){后级};
  \node at (3.4,0.8){输入};
  \draw (2,0)--(4,0)--(4,0.8);
  \draw (2,2)to [C](4,2)--(4,1.2);
  \draw [fill=white](0,1.2) circle (1.5pt);  \draw [fill=white](0,0.8) circle (1.5pt);
  \draw [fill=white](4,1.2) circle (1.5pt);  \draw [fill=white](4,0.8) circle (1.5pt);
\end{circuitikz}
\end{document}